deps: update dependency ch.qos.logback:logback-classic to v1.2.11 (#714)

* deps: update dependency ch.qos.logback:logback-classic to v1.2.11

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: renovate-bot

pom.xml

@@ -14,7 +14,7 @@
   </description>
 
   <properties>
-    <logback.version>1.2.10</logback.version>
+    <logback.version>1.2.11</logback.version>
     <easymock.version>4.3</easymock.version>
     <truth.version>1.1.3</truth.version>
     <logging.version>3.7.1</logging.version>